參數(shù)資料
    型號(hào): PIC12LC509A-04/SN
    廠商: Microchip Technology
    文件頁(yè)數(shù): 52/113頁(yè)
    文件大?。?/td> 0K
    描述: IC MCU OTP 1KX12 LV 8SOIC
    產(chǎn)品培訓(xùn)模塊: Asynchronous Stimulus
    標(biāo)準(zhǔn)包裝: 100
    系列: PIC® 12C
    核心處理器: PIC
    芯體尺寸: 8-位
    速度: 4MHz
    外圍設(shè)備: POR,WDT
    輸入/輸出數(shù): 5
    程序存儲(chǔ)器容量: 1.5KB(1K x 12)
    程序存儲(chǔ)器類型: OTP
    RAM 容量: 41 x 8
    電壓 - 電源 (Vcc/Vdd): 2.5 V ~ 5.5 V
    振蕩器型: 內(nèi)部
    工作溫度: 0°C ~ 70°C
    封裝/外殼: 8-SOIC(0.154",3.90mm 寬)
    包裝: 管件
    1999 Microchip Technology Inc.
    DS40139E-page 43
    PIC12C5XX
    8.6.1
    WDT PERIOD
    The WDT has a nominal time-out period of 18 ms,
    (with no prescaler). If a longer time-out period is
    desired, a prescaler with a division ratio of up to 1:128
    can be assigned to the WDT (under software control)
    by writing to the OPTION register. Thus, a time-out
    period of a nominal 2.3 seconds can be realized.
    These periods vary with temperature, VDD and part-to-
    part process variations (see DC specs).
    Under worst case conditions (VDD = Min., Temperature
    = Max., max. WDT prescaler), it may take several
    seconds before a WDT time-out occurs.
    8.6.2
    WDT PROGRAMMING CONSIDERATIONS
    The CLRWDT instruction clears the WDT and the
    postscaler, if assigned to the WDT, and prevents it
    from timing out and generating a device RESET.
    The SLEEP instruction resets the WDT and the
    postscaler, if assigned to the WDT. This gives the
    maximum SLEEP time before a WDT wake-up reset.
    FIGURE 8-12: WATCHDOG TIMER BLOCK DIAGRAM
    TABLE 8-6:
    SUMMARY OF REGISTERS ASSOCIATED WITH THE WATCHDOG TIMER
    Address
    Name
    Bit 7
    Bit 6
    Bit 5
    Bit 4
    Bit 3
    Bit 2
    Bit 1
    Bit 0
    Value on
    Power-On
    Reset
    Value on
    All Other
    Resets
    N/A
    OPTION
    GPWU
    GPPU
    T0CS
    T0SE
    PSA
    PS2
    PS1
    PS0
    1111 1111
    Legend: Shaded boxes = Not used by Watchdog Timer, — = unimplemented, read as ’0’, u = unchanged
    1
    0
    1
    0
    From Timer0 Clock Source
    To Timer0 (Figure 8-4)
    Postscaler
    WDT Enable
    Configuration Bit
    PSA
    WDT
    Time-out
    PS2:PS0
    PSA
    MUX
    8 - to - 1 MUX
    Postscaler
    M
    U
    X
    Watchdog
    Timer
    Note: T0CS, T0SE, PSA, PS2:PS0
    are bits in the OPTION register.
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